linux/drivers/mmc/core
Ben Hutchings bd68e0838f mmc: add module parameter to set whether cards are assumed removable
Some people run general-purpose distribution kernels on netbooks with
a card that is physically non-removable or logically non-removable
(e.g. used for /home) and cannot be cleanly unmounted during suspend.
Add a module parameter to set whether cards are assumed removable or
non-removable, with the default set by CONFIG_MMC_UNSAFE_RESUME.

In general, it is not possible to tell whether a card present in an MMC
slot after resume is the same that was there before suspend.  So there are
two possible behaviours, each of which will cause data loss in some cases:

CONFIG_MMC_UNSAFE_RESUME=n (default): Cards are assumed to be removed
during suspend.  Any filesystem on them must be unmounted before suspend;
otherwise, buffered writes will be lost.

CONFIG_MMC_UNSAFE_RESUME=y: Cards are assumed to remain present during
suspend.  They must not be swapped during suspend; otherwise, buffered
writes will be flushed to the wrong card.

Currently the choice is made at compile time and this allows that to be
overridden at module load time.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Wouter van Heyst <larstiq@larstiq.dyndns.org>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-15 08:53:35 -08:00
..
bus.c mmc: add MODALIAS linkage for MMC/SD devices 2009-03-24 21:29:58 +01:00
bus.h mmc: use sysfs groups to handle conditional attributes 2008-03-22 17:02:20 -07:00
core.c mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
core.h mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
debugfs.c const: constify remaining file_operations 2009-10-01 16:11:11 -07:00
host.c mmc: add 'enable' and 'disable' methods to mmc host 2009-09-23 07:39:33 -07:00
host.h mmc: add 'enable' and 'disable' methods to mmc host 2009-09-23 07:39:33 -07:00
Kconfig mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
Makefile mmc: Export internal host state through debugfs 2008-07-27 01:26:16 +02:00
mmc.c mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
mmc_ops.c mmc: check status after MMC SWITCH command 2009-09-23 07:39:34 -07:00
mmc_ops.h mmc: add mmc card sleep and awake support 2009-09-23 07:39:33 -07:00
sd.c mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
sd_ops.c cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
sd_ops.h drivers/mmc/core/: make 3 functions static 2007-07-26 02:05:57 +02:00
sdio.c mmc: propagate error codes back from bus drivers' suspend/resume methods 2009-09-23 07:39:38 -07:00
sdio_bus.c mmc: make SDIO device/driver struct accessors public 2009-09-23 07:39:38 -07:00
sdio_bus.h mmc: basic SDIO device model 2007-09-23 19:45:31 +02:00
sdio_cis.c sdio: rework cis tuple parsing 2009-12-15 08:53:34 -08:00
sdio_cis.h sdio: split up common and function CIS parsing 2007-09-23 20:44:22 +02:00
sdio_io.c sdio: add MMC_QUIRK_LENIENT_FN0 2009-09-23 07:39:37 -07:00
sdio_irq.c sdio: give sdio irq thread a host specific name 2008-10-12 11:04:30 +02:00
sdio_ops.c sdio: check that addresses are within the address space 2009-03-24 21:30:00 +01:00
sdio_ops.h sdio: extend sdio_readsb() and friends to handle any length of buffer 2007-09-23 21:21:32 +02:00